表面扩散

SiC纤维表面扩散障碍涂层对SiCf/Ni复合材料界面反应的影响

Effect of surface diffusion barrier coatings of sic_f on interfacial reactions of sic_f / ni Composites

MoO3在Al2O3薄膜表面扩散的研究

Study of MoO_3 Surface Diffusion on the A1_2O_3 Film

异质原子在Cu（001）表面扩散的分子动力学模拟

Molecular dynamics simulation of heterogeneous adatom diffusion on Cu ( 001 ) surface

表面扩散对CO氧化反应一级相变点的影响：蒙特卡罗模拟

The Influence of Diffusion on the First Order Phase Transition Point of CO Oxidation : Monte Carlo Simulation

实验结果表明，退火温度的升高导致N元素向表面扩散和界面反应的发生。

Experimental results indicate that increasing of annealing temperature can contribute to outdiffusion of N elements and compounds reaction at the interface .

发现和研究了表面扩散对CVD金刚石成核的重要影响。

A great impact of surface diffusion on CVD diamond nucleation is discovered and investigated .

Fe3O4烧结为表面扩散控制。

The Fe_3O_4 sintering proceeded via surface diffusion .

Cu在Pt表面扩散激活能和扩散系数的ASED-MO计算

ASED-MO study of activation energies and diffusion coefficients of Cu on Pt surfaces

目的探讨SENSE基础上扩散加权成像在诊断肝占位性病变中的应用价值以及表面扩散系数（ADC）评估肝占位病变的价值。

Objective : To evaluate the value of diffusion-weighted imaging based on SENSE technology and apparent diffusion coefficient ( ADC ) in diagnosis of hepatic masses .

氢原子在平坦金属锂（100）面上表面扩散行为的ABINITIO研究

Surface Diffusion of a Hydrogen Atom on Smooth Lithium ( 100 ) Surface Using ab initio Cluster Study

选取TiO2的主要晶态金红石构型，通过构造合理的团簇模型，计算镍离子在金红石（110）和（100）表面扩散的可能性及其强度大小。

The cluster models of rutile were selected and nickel release was researched on rutile ( 110 ) and ( 110 ) surface , respectively .

TGS晶体生长多形性和其表面扩散生长机制

Tgs crystal growth polymorphism and surface diffusion growth mechanism

SEM观察表明：晶内疲劳微裂纹纵剖面二维形态发生了主要由表面扩散控制的形态变化，由初始的扁椭圆形演化成多个球洞定向排列的形态；

SEM observations show that the two-dimensional longitudinal section of the intragranular microcracks evolves from the original thin-ellipse shape into the several aligned spherical voids dominated by surface diffusion .

此外还求取了表面扩散指前因子Dso为1.85×10？

The pre-exponential factor Dso is 1.85 × 10 ?

目的探讨脑梗死在扩散加权像（diffusionweightedimaging，DWI）上信号强度、表面扩散系数（ApparentDiffusionCoefficient，ADC）变化的时间过程及两者的关系。

Objectiv To analyze the time course of changes in signal intensity and apparent diffusion coefficient ( ADC ) evolution of cerebral infarcts with diffusion-weighted imaging imaging ( DWI ) .

研究结果表明：在连接过程中，Cu层首先熔化，Nb、Ni向液态Cu中扩散溶解形成Cu-Nb-Ni合金，液态合金中的Nb和Ni向Si3N4表面扩散聚集并与Si3N4反应形成反应层；

The results showed that Nb and Ni dissolved into molten Cu to form Cu-Nb-Ni liquid alloy and then diffused to the surface of Si_3N_4 to form reaction layer .

模拟结果表明，表面扩散是Mo粉末烧结过程的主导扩散机制；压坯致密度越高，烧结完成的时间越短。

The simulation results show that the dominant diffusion mechanism in the sintering process of Mo powder is surface diffusion , and the higher the density of green compact , the shorter the sintering time .

用表面扩散法制备SrAl2O4：Eu，Dy磷光体。用此方法制备的样品的发光强度高于传统固相法制备的样品。

Phosphor SrAl2O4 : Eu , Dy synthesized by surface diffusion method has higher luminescence intensity than that by the solid state method .

激光分子束外延SrTiO3薄膜退火过程中表面扩散的研究

Surface Diffusion in Annealing of SrTiO_3 Film Grown by Laser Molecular Beam Epitaxy

通过动力学分析证实HA涂层的形成速率主要由溶液中的离子向阴极表面扩散所控制，存在的诱导期随着温度的升高而缩短。

It was indicated that the growth rate of hydroxyapatite coating was mainly controlled by the diffusion of ions towards to the cathode . An induction period was exised during the hydroxyapatite precipitation , which showed a decrease upon increasing temperature .

初步尝试用表面扩散法合成了SrAl2O4：Eu~（2+），Dy~（3+），并讨论了工艺参数对其发光性能的影响。

Furthermore , SrAl2O4 : Eu2 + , Dy3 + was synthesized by the surface diffusion method and the influences of technological parameters on luminescence performance were discussed .

采用相场法模拟了表面扩散和晶界扩散机制共同作用下的四球模型和五球模型中Mo粉末压坯微粒间烧结颈长大以及孔隙的演化过程。

The formation , growth of the sintering necks and the spheroidization of the pores , which are mainly controlled by surface diffusion and grain boundary diffusion during the sintering of Mo powder , were simulated respectively by using both four-ball and five-ball model .

本文采用ASED-MO方法，计算了几O分子在Pt（100）面上不同吸附取向、不同吸附位置时的结合能，以及表面扩散激活能和扩散系数。

Using ASED-MO method , the binding energies for different adsorption orientations and positions of H_2O molecule on Pt ( l00 ), and the activation energies and coefficient of surface diffusion are calculated .

实验表明，钎焊时Ni-Fe合金中的Fe元素向金刚石表面扩散，并在钎料与金刚石的界面与金刚石中的碳反应生成碳化物Fe5C2。这是一种具有复杂晶格结构的间隙化合物。

The experiments show that : the element of Fe in Ni-Fe alloy diffuses to the diamond surface and reacts with C in diamond so as to form a thin layer of carbide Fe_5C_2 at the interface between diamond and the filler metal .

结果表明：由于脉冲电沉积的一个关断时间使离子得以从溶液本体向电极表面扩散，在下一脉冲来临时浓差极化的减小有利于HAP的生长；

The results of pulsed electrodeposition show that there exists a relaxation time which is beneficial to the growth of HAP , due to it enables ions diffuse from bulk to the surface of electrode and reduce concentration polarization in the next pulse time .

当碱液中氢氧化钠浓度为2M或更高时，其表面扩散速率与浓度的增加无关，这种现象与菲克（Fick）扩散原理是一致的，该原理可用于解释化学去皮过程中所产生的一些现象。

While NaOH concentration of the lye is 2M or more , the surface diffusion rate don 't vary with the concentration increasing , It 's in accordance with Fick diffusion principle . This can be used to explain some phenomena in chemical decortication .

这表明附加催化层对电极性能的改善只能依靠中间体的表面扩散，中间体在无Nafion的催化剂表面生成并扩散到Pt/Nafion界面参与传荷反应。

Therefore , the increased performance due to the additional Nafion-free catalyst layer must rely on the surface diffusion of reactive intermediates which were produced on the Nafion-free Pt surfaces and diffused to Pt / Nafion interfaces to undergo charge transfer reactions there . 5 .

研究了四氢呋喃水溶液在间歇搅拌槽内3Ao分子筛上的吸附平衡和动力学，用Langmuir方程拟合了吸附等温线，并用粒内表面扩散模型和Langmuir方程对吸附动力学曲线进行拟合。

The adsorption equilibrium and kinetics of tetrahydrofuran aqueous solution on 3 A ο zeolite was studied in a batch agitator tank . The adsorption isotherm was fitted by using Langmuir Equation , and the adsorption kinetics data were fitted by the particle surface diffusion model and Langmuir Equation .

对多孔固体表面扩散二元系统给出Fick定律交叉项扩散系数矩阵形式的计算式，并将其推广到三元及多元扩散系统，得到Fick定律交叉项扩散系数普遍化的计算式。

A theoretical computation equation of Fick 's law in matrix form is given for predicting the cross - term coefficients in binary diffusion , and the results are extended to 3 - component and multicomponent diffusion systems . Finally , a generalized equation of Fick 's law is obtained .

给出了沟道表面扩散浓度在20×1016～100×1016cm-3范围内DMOS器件的阈值电压简明计算式.该模型的提出解决了以往所用的DMOS阈值电压模型计算很不准确的问题。

Simplify expression of DMOS devices threshold voltage model is proposed as the diffusion concentration changing from 2.0 × 10 16 cm - 3 to 10.0 × 10 16 cm - 3 . This model overcomes former inaccuracy of DMOS threshold voltage .